There is a 20 minute parking _____ here, so we must get back to the car very quickly.

The workers wouldn’t run the _______ in letting an unreliable person take charge of the factory. 

There’re more Olympic______ winners per head of population in Australia than in other countries.

.There was a ______ of complaints from the press about the bad language used in the special TV show.

On April 1st the westerners like to play________on each other but they make sure that no one is hurt.